AFAIK the single known chip in Ingenic JZ4750D line is JZ4755. It has just the same CPU core as JZ4740, but another set of peripherals (though the program model for the most of the peripherals is the same). +-----------------+--------------+--------------+ | | JZ4755 | JZ4740 | +-----------------+--------------+--------------+ | UART | 3 | 4 | | MSC (mmc/sd) | 2 | 1 | | GPIO | 5x32 | 4x32 | | TCU (timers) | 6x16 + 1x32 | 8x16 | | USB | device 2.0 | host 1.1 | | | | device 2.0 | +-----------------+--------------+--------------+ The most significant advantage of the JZ4755 chip is the second MIPS core dedicated for image processing. Also JZ4755 is made with use of more precise technology and it can run on the higher clock rate (approx. 433 MHz for JZ4755 vs 336 MHz for JZ4740). The JZ4755 is used in some game consoles: * Ritmix RZX-50; * Dingoo A320E/A380; * GameLinBox. This patch series based on the work of Lars-Peter Clausen. To tell the truth it is the Lars-Peter Clausen's patches with some fixes and changes. As most of the code for JZ4750D is very close to code for JZ4740 we can incorporate the code for JZ4750D to the code for JZ4740 to avoid code duplication. I propose to rename 'jz4740' mach directory to 'xburst' or 'ingenic'. The patch series introduces the minimal support for the JZ4755, no peripherals are enabled save UART1. To test the kernel I run it with incorporated initrd rootfs made with help of https://github.com/gcwnow/buildroot.git -- Best regards, Antony Pavlov
